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@@ -17,10 +17,13 @@ |
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#include <stdlib.h> |
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#include <openssl/bio.h> |
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#include <openssl/bytestring.h> |
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#include <openssl/crypto.h> |
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#include <openssl/digest.h> |
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#include <openssl/err.h> |
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#include <openssl/evp.h> |
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#include <openssl/rsa.h> |
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#include <openssl/x509.h> |
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/* kExampleRSAKeyDER is an RSA private key in ASN.1, DER format. Of course, you |
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@@ -95,26 +98,104 @@ static const uint8_t kSignature[] = { |
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0x55, 0xa7, 0xab, 0x45, 0x02, 0x97, 0x60, 0x42, |
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}; |
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/* kExamplePSSCert is an example self-signed certificate, signed with |
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* kExampleRSAKeyDER using RSA-PSS with default hash functions. */ |
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static const uint8_t kExamplePSSCert[] = { |
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0x30, 0x82, 0x02, 0x62, 0x30, 0x82, 0x01, 0xc6, 0xa0, 0x03, 0x02, 0x01, |
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0x02, 0x02, 0x09, 0x00, 0x8d, 0xea, 0x53, 0x24, 0xfa, 0x48, 0x87, 0xf3, |
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0x30, 0x12, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, |
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0x0a, 0x30, 0x05, 0xa2, 0x03, 0x02, 0x01, 0x6a, 0x30, 0x45, 0x31, 0x0b, |
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0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06, 0x13, 0x02, 0x41, 0x55, 0x31, |
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0x13, 0x30, 0x11, 0x06, 0x03, 0x55, 0x04, 0x08, 0x0c, 0x0a, 0x53, 0x6f, |
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0x6d, 0x65, 0x2d, 0x53, 0x74, 0x61, 0x74, 0x65, 0x31, 0x21, 0x30, 0x1f, |
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0x06, 0x03, 0x55, 0x04, 0x0a, 0x0c, 0x18, 0x49, 0x6e, 0x74, 0x65, 0x72, |
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0x6e, 0x65, 0x74, 0x20, 0x57, 0x69, 0x64, 0x67, 0x69, 0x74, 0x73, 0x20, |
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0x50, 0x74, 0x79, 0x20, 0x4c, 0x74, 0x64, 0x30, 0x1e, 0x17, 0x0d, 0x31, |
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0x34, 0x31, 0x30, 0x30, 0x39, 0x31, 0x39, 0x30, 0x39, 0x35, 0x35, 0x5a, |
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0x17, 0x0d, 0x31, 0x35, 0x31, 0x30, 0x30, 0x39, 0x31, 0x39, 0x30, 0x39, |
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0x35, 0x35, 0x5a, 0x30, 0x45, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, |
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0x04, 0x06, 0x13, 0x02, 0x41, 0x55, 0x31, 0x13, 0x30, 0x11, 0x06, 0x03, |
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0x55, 0x04, 0x08, 0x0c, 0x0a, 0x53, 0x6f, 0x6d, 0x65, 0x2d, 0x53, 0x74, |
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0x61, 0x74, 0x65, 0x31, 0x21, 0x30, 0x1f, 0x06, 0x03, 0x55, 0x04, 0x0a, |
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0x0c, 0x18, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x20, 0x57, |
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0x69, 0x64, 0x67, 0x69, 0x74, 0x73, 0x20, 0x50, 0x74, 0x79, 0x20, 0x4c, |
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0x74, 0x64, 0x30, 0x81, 0x9f, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, |
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0x86, 0xf7, 0x0d, 0x01, 0x01, 0x01, 0x05, 0x00, 0x03, 0x81, 0x8d, 0x00, |
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0x30, 0x81, 0x89, 0x02, 0x81, 0x81, 0x00, 0xf8, 0xb8, 0x6c, 0x83, 0xb4, |
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0xbc, 0xd9, 0xa8, 0x57, 0xc0, 0xa5, 0xb4, 0x59, 0x76, 0x8c, 0x54, 0x1d, |
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0x79, 0xeb, 0x22, 0x52, 0x04, 0x7e, 0xd3, 0x37, 0xeb, 0x41, 0xfd, 0x83, |
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0xf9, 0xf0, 0xa6, 0x85, 0x15, 0x34, 0x75, 0x71, 0x5a, 0x84, 0xa8, 0x3c, |
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0xd2, 0xef, 0x5a, 0x4e, 0xd3, 0xde, 0x97, 0x8a, 0xdd, 0xff, 0xbb, 0xcf, |
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0x0a, 0xaa, 0x86, 0x92, 0xbe, 0xb8, 0x50, 0xe4, 0xcd, 0x6f, 0x80, 0x33, |
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0x30, 0x76, 0x13, 0x8f, 0xca, 0x7b, 0xdc, 0xec, 0x5a, 0xca, 0x63, 0xc7, |
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0x03, 0x25, 0xef, 0xa8, 0x8a, 0x83, 0x58, 0x76, 0x20, 0xfa, 0x16, 0x77, |
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0xd7, 0x79, 0x92, 0x63, 0x01, 0x48, 0x1a, 0xd8, 0x7b, 0x67, 0xf1, 0x52, |
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0x55, 0x49, 0x4e, 0xd6, 0x6e, 0x4a, 0x5c, 0xd7, 0x7a, 0x37, 0x36, 0x0c, |
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0xde, 0xdd, 0x8f, 0x44, 0xe8, 0xc2, 0xa7, 0x2c, 0x2b, 0xb5, 0xaf, 0x64, |
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0x4b, 0x61, 0x07, 0x02, 0x03, 0x01, 0x00, 0x01, 0xa3, 0x50, 0x30, 0x4e, |
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0x30, 0x1d, 0x06, 0x03, 0x55, 0x1d, 0x0e, 0x04, 0x16, 0x04, 0x14, 0xd0, |
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0x41, 0xfb, 0x89, 0x41, 0x1e, 0xa7, 0xad, 0x5a, 0xec, 0x34, 0x5d, 0x49, |
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0x11, 0xf9, 0x55, 0x81, 0x78, 0x1f, 0x13, 0x30, 0x1f, 0x06, 0x03, 0x55, |
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0x1d, 0x23, 0x04, 0x18, 0x30, 0x16, 0x80, 0x14, 0xd0, 0x41, 0xfb, 0x89, |
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0x41, 0x1e, 0xa7, 0xad, 0x5a, 0xec, 0x34, 0x5d, 0x49, 0x11, 0xf9, 0x55, |
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0x81, 0x78, 0x1f, 0x13, 0x30, 0x0c, 0x06, 0x03, 0x55, 0x1d, 0x13, 0x04, |
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0x05, 0x30, 0x03, 0x01, 0x01, 0xff, 0x30, 0x12, 0x06, 0x09, 0x2a, 0x86, |
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0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x0a, 0x30, 0x05, 0xa2, 0x03, 0x02, |
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0x01, 0x6a, 0x03, 0x81, 0x81, 0x00, 0x49, 0x4c, 0xb6, 0x45, 0x97, 0x20, |
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0x35, 0xb3, 0x50, 0x64, 0x0d, 0x3f, 0xec, 0x5f, 0x95, 0xd5, 0x84, 0xcb, |
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0x11, 0x7c, 0x03, 0xd7, 0xa6, 0xe6, 0xfa, 0x24, 0x95, 0x9f, 0x31, 0xb0, |
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0xb5, 0xec, 0x66, 0x41, 0x51, 0x18, 0x21, 0x91, 0xbb, 0xe0, 0xaf, 0xf0, |
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0xc5, 0xb7, 0x59, 0x41, 0xd4, 0xdb, 0xa4, 0xd2, 0x64, 0xa7, 0x54, 0x0f, |
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0x8c, 0xf7, 0xe1, 0xd3, 0x3b, 0x1a, 0xb7, 0x0e, 0x9d, 0x9a, 0xde, 0x50, |
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0xa1, 0x9f, 0x0a, 0xf0, 0xda, 0x34, 0x0e, 0x34, 0x7d, 0x76, 0x07, 0xfe, |
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0x5a, 0xfb, 0xf9, 0x58, 0x9b, 0xc9, 0x50, 0x84, 0x01, 0xa0, 0x05, 0x4d, |
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0x67, 0x42, 0x0b, 0xf8, 0xe4, 0x05, 0xcf, 0xaf, 0x8b, 0x71, 0x31, 0xf1, |
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0x0f, 0x6e, 0xc9, 0x24, 0x27, 0x9b, 0xac, 0x04, 0xd7, 0x64, 0x0d, 0x30, |
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0x4e, 0x11, 0x93, 0x40, 0x39, 0xbb, 0x72, 0xb2, 0xfe, 0x6b, 0xe4, 0xae, |
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0x8c, 0x16, |
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}; |
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int example_EVP_DigestSignInit(void) { |
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int ret = 0; |
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static EVP_PKEY *load_example_rsa_key(void) { |
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EVP_PKEY *ret = NULL; |
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const uint8_t *derp = kExampleRSAKeyDER; |
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EVP_PKEY *pkey = NULL; |
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RSA *rsa = NULL; |
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const uint8_t *derp = kExampleRSAKeyDER; |
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uint8_t *sig = NULL; |
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size_t sig_len = 0; |
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EVP_MD_CTX md_ctx; |
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EVP_MD_CTX_init(&md_ctx); |
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if (!d2i_RSAPrivateKey(&rsa, &derp, sizeof(kExampleRSAKeyDER))) { |
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goto out; |
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return NULL; |
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} |
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pkey = EVP_PKEY_new(); |
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sig = malloc(sig_len); |
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if (pkey == NULL || !EVP_PKEY_set1_RSA(pkey, rsa)) { |
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goto out; |
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} |
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ret = pkey; |
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pkey = NULL; |
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out: |
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if (pkey) { |
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EVP_PKEY_free(pkey); |
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} |
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if (rsa) { |
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RSA_free(rsa); |
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} |
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return ret; |
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} |
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static int example_EVP_DigestSignInit(void) { |
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int ret = 0; |
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EVP_PKEY *pkey = NULL; |
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uint8_t *sig = NULL; |
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size_t sig_len = 0; |
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EVP_MD_CTX md_ctx, md_ctx_verify; |
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EVP_MD_CTX_init(&md_ctx); |
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EVP_MD_CTX_init(&md_ctx_verify); |
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pkey = load_example_rsa_key(); |
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if (pkey == NULL || |
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!EVP_PKEY_set1_RSA(pkey, rsa) || |
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EVP_DigestSignInit(&md_ctx, NULL, EVP_sha256(), NULL, pkey) != 1 || |
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EVP_DigestSignUpdate(&md_ctx, kMsg, sizeof(kMsg)) != 1) { |
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goto out; |
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@@ -124,17 +205,20 @@ int example_EVP_DigestSignInit(void) { |
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goto out; |
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} |
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/* Sanity check for testing. */ |
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if (sig_len != RSA_size(rsa)) { |
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if (sig_len != EVP_PKEY_size(pkey)) { |
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fprintf(stderr, "sig_len mismatch\n"); |
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goto out; |
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} |
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sig = malloc(sig_len); |
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if (sig == NULL) { |
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if (sig == NULL || EVP_DigestSignFinal(&md_ctx, sig, &sig_len) != 1) { |
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goto out; |
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} |
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if (EVP_DigestSignFinal(&md_ctx, sig, &sig_len) != 1) { |
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free(sig); |
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/* Ensure that the signature round-trips. */ |
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if (EVP_DigestVerifyInit(&md_ctx_verify, NULL, EVP_sha256(), NULL, pkey) != 1 || |
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EVP_DigestVerifyUpdate(&md_ctx_verify, kMsg, sizeof(kMsg)) != 1 || |
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EVP_DigestVerifyFinal(&md_ctx_verify, sig, sig_len) != 1) { |
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goto out; |
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} |
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@@ -146,12 +230,10 @@ out: |
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} |
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EVP_MD_CTX_cleanup(&md_ctx); |
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EVP_MD_CTX_cleanup(&md_ctx_verify); |
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if (pkey) { |
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EVP_PKEY_free(pkey); |
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} |
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if (rsa) { |
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RSA_free(rsa); |
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} |
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if (sig) { |
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free(sig); |
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} |
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@@ -159,22 +241,15 @@ out: |
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return ret; |
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} |
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int example_EVP_DigestVerifyInit(void) { |
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static int example_EVP_DigestVerifyInit(void) { |
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int ret = 0; |
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EVP_PKEY *pkey = NULL; |
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RSA *rsa = NULL; |
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const uint8_t *derp = kExampleRSAKeyDER; |
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EVP_MD_CTX md_ctx; |
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EVP_MD_CTX_init(&md_ctx); |
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if (!d2i_RSAPrivateKey(&rsa, &derp, sizeof(kExampleRSAKeyDER))) { |
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goto out; |
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} |
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pkey = EVP_PKEY_new(); |
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pkey = load_example_rsa_key(); |
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if (pkey == NULL || |
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!EVP_PKEY_set1_RSA(pkey, rsa) || |
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EVP_DigestVerifyInit(&md_ctx, NULL, EVP_sha256(), NULL, pkey) != 1 || |
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EVP_DigestVerifyUpdate(&md_ctx, kMsg, sizeof(kMsg)) != 1 || |
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EVP_DigestVerifyFinal(&md_ctx, kSignature, sizeof(kSignature)) != 1) { |
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@@ -191,8 +266,169 @@ out: |
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if (pkey) { |
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EVP_PKEY_free(pkey); |
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} |
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if (rsa) { |
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RSA_free(rsa); |
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return ret; |
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} |
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/* test_algorithm_roundtrip signs a message using an already-initialized |
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* |md_ctx|, sampling the AlgorithmIdentifier. It then uses |pkey| and the |
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* AlgorithmIdentifier to verify the signature. */ |
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static int test_algorithm_roundtrip(EVP_MD_CTX *md_ctx, EVP_PKEY *pkey) { |
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int ret = 0; |
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uint8_t *sig = NULL; |
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size_t sig_len = 0; |
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EVP_MD_CTX md_ctx_verify; |
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X509_ALGOR *algor = NULL; |
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EVP_MD_CTX_init(&md_ctx_verify); |
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if (EVP_DigestSignUpdate(md_ctx, kMsg, sizeof(kMsg)) != 1) { |
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goto out; |
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} |
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/* Save the algorithm. */ |
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algor = X509_ALGOR_new(); |
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if (algor == NULL || !EVP_DigestSignAlgorithm(md_ctx, algor)) { |
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goto out; |
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} |
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/* Determine the size of the signature. */ |
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if (EVP_DigestSignFinal(md_ctx, NULL, &sig_len) != 1) { |
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goto out; |
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} |
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/* Sanity check for testing. */ |
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if (sig_len != EVP_PKEY_size(pkey)) { |
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fprintf(stderr, "sig_len mismatch\n"); |
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goto out; |
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} |
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sig = malloc(sig_len); |
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if (sig == NULL || EVP_DigestSignFinal(md_ctx, sig, &sig_len) != 1) { |
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goto out; |
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} |
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/* Ensure that the signature round-trips. */ |
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if (EVP_DigestVerifyInitFromAlgorithm(&md_ctx_verify, algor, pkey) != 1 || |
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EVP_DigestVerifyUpdate(&md_ctx_verify, kMsg, sizeof(kMsg)) != 1 || |
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EVP_DigestVerifyFinal(&md_ctx_verify, sig, sig_len) != 1) { |
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goto out; |
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} |
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ret = 1; |
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out: |
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EVP_MD_CTX_cleanup(&md_ctx_verify); |
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if (sig) { |
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free(sig); |
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} |
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if (algor) { |
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X509_ALGOR_free(algor); |
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} |
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return ret; |
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} |
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static int test_EVP_DigestSignAlgorithm(void) { |
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int ret = 0; |
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EVP_PKEY *pkey = NULL; |
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EVP_MD_CTX md_ctx; |
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EVP_PKEY_CTX *pkey_ctx; |
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EVP_MD_CTX_init(&md_ctx); |
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pkey = load_example_rsa_key(); |
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if (pkey == NULL) { |
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goto out; |
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} |
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/* Test a simple AlgorithmIdentifier. */ |
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if (EVP_DigestSignInit(&md_ctx, &pkey_ctx, EVP_sha256(), NULL, pkey) != 1 || |
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!test_algorithm_roundtrip(&md_ctx, pkey)) { |
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fprintf(stderr, "RSA with SHA-256 failed\n"); |
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goto out; |
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} |
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EVP_MD_CTX_cleanup(&md_ctx); |
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EVP_MD_CTX_init(&md_ctx); |
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/* Test RSA-PSS with custom parameters. */ |
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if (EVP_DigestSignInit(&md_ctx, &pkey_ctx, EVP_sha256(), NULL, pkey) != 1 || |
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EVP_PKEY_CTX_set_rsa_padding(pkey_ctx, RSA_PKCS1_PSS_PADDING) != 1 || |
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EVP_PKEY_CTX_set_rsa_mgf1_md(pkey_ctx, EVP_sha512()) != 1 || |
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!test_algorithm_roundtrip(&md_ctx, pkey)) { |
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fprintf(stderr, "RSA-PSS failed\n"); |
|
|
|
goto out; |
|
|
|
} |
|
|
|
|
|
|
|
ret = 1; |
|
|
|
|
|
|
|
out: |
|
|
|
if (!ret) { |
|
|
|
BIO_print_errors_fp(stderr); |
|
|
|
} |
|
|
|
|
|
|
|
EVP_MD_CTX_cleanup(&md_ctx); |
|
|
|
if (pkey) { |
|
|
|
EVP_PKEY_free(pkey); |
|
|
|
} |
|
|
|
|
|
|
|
return ret; |
|
|
|
} |
|
|
|
|
|
|
|
static int example_EVP_DigestVerifyInitFromAlgorithm(void) { |
|
|
|
int ret = 0; |
|
|
|
CBS cert, cert_body, tbs_cert, algorithm, signature; |
|
|
|
uint8_t padding; |
|
|
|
X509_ALGOR *algor = NULL; |
|
|
|
const uint8_t *derp; |
|
|
|
EVP_PKEY *pkey = NULL; |
|
|
|
EVP_MD_CTX md_ctx; |
|
|
|
|
|
|
|
EVP_MD_CTX_init(&md_ctx); |
|
|
|
|
|
|
|
CBS_init(&cert, kExamplePSSCert, sizeof(kExamplePSSCert)); |
|
|
|
if (!CBS_get_asn1(&cert, &cert_body, CBS_ASN1_SEQUENCE) || |
|
|
|
CBS_len(&cert) != 0 || |
|
|
|
!CBS_get_any_asn1_element(&cert_body, &tbs_cert, NULL, NULL) || |
|
|
|
!CBS_get_asn1_element(&cert_body, &algorithm, CBS_ASN1_SEQUENCE) || |
|
|
|
!CBS_get_asn1(&cert_body, &signature, CBS_ASN1_BITSTRING) || |
|
|
|
CBS_len(&cert_body) != 0) { |
|
|
|
fprintf(stderr, "Failed to parse certificate\n"); |
|
|
|
goto out; |
|
|
|
} |
|
|
|
|
|
|
|
/* Signatures are BIT STRINGs, but they have are multiple of 8 bytes, so the |
|
|
|
leading phase byte is just a zero. */ |
|
|
|
if (!CBS_get_u8(&signature, &padding) || padding != 0) { |
|
|
|
fprintf(stderr, "Invalid signature padding\n"); |
|
|
|
goto out; |
|
|
|
} |
|
|
|
|
|
|
|
derp = CBS_data(&algorithm); |
|
|
|
if (!d2i_X509_ALGOR(&algor, &derp, CBS_len(&algorithm)) || |
|
|
|
derp != CBS_data(&algorithm) + CBS_len(&algorithm)) { |
|
|
|
fprintf(stderr, "Failed to parse algorithm\n"); |
|
|
|
} |
|
|
|
|
|
|
|
pkey = load_example_rsa_key(); |
|
|
|
if (pkey == NULL || |
|
|
|
EVP_DigestVerifyInitFromAlgorithm(&md_ctx, algor, pkey) != 1|| |
|
|
|
EVP_DigestVerifyUpdate(&md_ctx, CBS_data(&tbs_cert), |
|
|
|
CBS_len(&tbs_cert)) != 1 || |
|
|
|
EVP_DigestVerifyFinal(&md_ctx, CBS_data(&signature), |
|
|
|
CBS_len(&signature)) != 1) { |
|
|
|
goto out; |
|
|
|
} |
|
|
|
ret = 1; |
|
|
|
|
|
|
|
out: |
|
|
|
if (!ret) { |
|
|
|
BIO_print_errors_fp(stderr); |
|
|
|
} |
|
|
|
|
|
|
|
EVP_MD_CTX_cleanup(&md_ctx); |
|
|
|
if (pkey) { |
|
|
|
EVP_PKEY_free(pkey); |
|
|
|
} |
|
|
|
|
|
|
|
return ret; |
|
|
@@ -200,6 +436,7 @@ out: |
|
|
|
|
|
|
|
int main(void) { |
|
|
|
CRYPTO_library_init(); |
|
|
|
ERR_load_crypto_strings(); |
|
|
|
|
|
|
|
if (!example_EVP_DigestSignInit()) { |
|
|
|
fprintf(stderr, "EVP_DigestSignInit failed\n"); |
|
|
@@ -211,6 +448,16 @@ int main(void) { |
|
|
|
return 1; |
|
|
|
} |
|
|
|
|
|
|
|
if (!test_EVP_DigestSignAlgorithm()) { |
|
|
|
fprintf(stderr, "EVP_DigestSignInit failed\n"); |
|
|
|
return 1; |
|
|
|
} |
|
|
|
|
|
|
|
if (!example_EVP_DigestVerifyInitFromAlgorithm()) { |
|
|
|
fprintf(stderr, "EVP_DigestVerifyInitFromAlgorithm failed\n"); |
|
|
|
return 1; |
|
|
|
} |
|
|
|
|
|
|
|
printf("PASS\n"); |
|
|
|
return 0; |
|
|
|
} |