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https://github.com/yuzu-emu/mbedtls.git
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Add tests for PKCS#1 v1.5 decoding
Functional tests for various payload sizes and output buffer sizes. When the padding is bad or the plaintext is too large for the output buffer, verify that function writes some outputs. This doesn't validate that the implementation is time-constant, but it at least validates that it doesn't just return early without outputting anything.
This commit is contained in:
Gilles Peskine
parent
58e60097cd
commit
3b3d5e24ea
@ -33,3 +33,93 @@ pkcs1_rsassa_v15_sign:1024:16:"d17f655bf27c8b16d35462c905cc04a26f37e2a67fa9c0ce0
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RSASSA-V15 Verification Test Vector Int
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pkcs1_rsassa_v15_verify:1024:16:"a2ba40ee07e3b2bd2f02ce227f36a195024486e49c19cb41bbbdfbba98b22b0e577c2eeaffa20d883a76e65e394c69d4b3c05a1e8fadda27edb2a42bc000fe888b9b32c22d15add0cd76b3e7936e19955b220dd17d4ea904b1ec102b2e4de7751222aa99151024c7cb41cc5ea21d00eeb41f7c800834d2c6e06bce3bce7ea9a5":16:"010001":MBEDTLS_MD_SHA1:MBEDTLS_MD_SHA1:"859eef2fd78aca00308bdc471193bf55bf9d78db8f8a672b484634f3c9c26e6478ae10260fe0dd8c082e53a5293af2173cd50c6d5d354febf78b26021c25c02712e78cd4694c9f469777e451e7f8e9e04cd3739c6bbfedae487fb55644e9ca74ff77a53cb729802f6ed4a5ffa8ba159890fc":"e3b5d5d002c1bce50c2b65ef88a188d83bce7e61":"2154f928615e5101fcdeb57bc08fc2f35c3d5996403861ae3efb1d0712f8bb05cc21f7f5f11f62e5b6ea9f0f2b62180e5cbe7ba535032d6ac8068fff7f362f73d2c3bf5eca6062a1723d7cfd5abb6dcf7e405f2dc560ffe6fc37d38bee4dc9e24fe2bece3e3b4a3f032701d3f0947b42930083dd4ad241b3309b514595482d42":0
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RSAES-V15 decoding: good, payload=max, tight output buffer
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pkcs1_v15_decode:MBEDTLS_RSA_PRIVATE:"0002505152535455565700":117:117:0
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RSAES-V15 decoding: good, payload=max, larger output buffer
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pkcs1_v15_decode:MBEDTLS_RSA_PRIVATE:"0002505152535455565700":117:128:0
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RSAES-V15 decoding: good, payload=max-1, tight output buffer
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pkcs1_v15_decode:MBEDTLS_RSA_PRIVATE:"000250515253545556575800":116:116:0
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RSAES-V15 decoding: good, payload=max-1, larger output buffer
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pkcs1_v15_decode:MBEDTLS_RSA_PRIVATE:"000250515253545556575800":116:117:0
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RSAES-V15 decoding: good, payload=1
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pkcs1_v15_decode:MBEDTLS_RSA_PRIVATE:"00025050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505000":1:1:0
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RSAES-V15 decoding: good, empty payload
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pkcs1_v15_decode:MBEDTLS_RSA_PRIVATE:"0002505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505000":0:0:0
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RSAES-V15 decoding: payload=max, output too large
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pkcs1_v15_decode:MBEDTLS_RSA_PRIVATE:"0002505152535455565700":117:116:MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE
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RSAES-V15 decoding: payload=max-1, output too large
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pkcs1_v15_decode:MBEDTLS_RSA_PRIVATE:"000250515253545556575800":116:115:MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE
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RSAES-V15 decoding: bad first byte
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pkcs1_v15_decode:MBEDTLS_RSA_PRIVATE:"0102505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050":0:42:MBEDTLS_ERR_RSA_INVALID_PADDING
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RSAES-V15 decoding: bad second byte (0 instead of 2)
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pkcs1_v15_decode:MBEDTLS_RSA_PRIVATE:"0000505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050":0:42:MBEDTLS_ERR_RSA_INVALID_PADDING
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RSAES-V15 decoding: bad second byte (1 instead of 2)
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pkcs1_v15_decode:MBEDTLS_RSA_PRIVATE:"0001505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050":0:42:MBEDTLS_ERR_RSA_INVALID_PADDING
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RSAES-V15 decoding: padding too short (0)
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pkcs1_v15_decode:MBEDTLS_RSA_PRIVATE:"000200":0:42:MBEDTLS_ERR_RSA_INVALID_PADDING
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RSAES-V15 decoding: padding too short (7)
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pkcs1_v15_decode:MBEDTLS_RSA_PRIVATE:"0002505050505050500000ffffffffffffffffff00":0:42:MBEDTLS_ERR_RSA_INVALID_PADDING
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RSAES-V15 decoding: unfinished padding
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pkcs1_v15_decode:MBEDTLS_RSA_PRIVATE:"0002505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050505050":0:42:MBEDTLS_ERR_RSA_INVALID_PADDING
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EMSA-V15 decoding: good, payload=max, tight output buffer
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pkcs1_v15_decode:MBEDTLS_RSA_PUBLIC:"0001ffffffffffffffff00":117:117:0
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EMSA-V15 decoding: good, payload=max, larger output buffer
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pkcs1_v15_decode:MBEDTLS_RSA_PUBLIC:"0001ffffffffffffffff00":117:128:0
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EMSA-V15 decoding: good, payload=max-1, tight output buffer
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pkcs1_v15_decode:MBEDTLS_RSA_PUBLIC:"0001ffffffffffffffffff00":116:116:0
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EMSA-V15 decoding: good, payload=max-1, larger output buffer
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pkcs1_v15_decode:MBEDTLS_RSA_PUBLIC:"0001ffffffffffffffffff00":116:117:0
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EMSA-V15 decoding: good, payload=1
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pkcs1_v15_decode:MBEDTLS_RSA_PUBLIC:"0001ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff00":1:1:0
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EMSA-V15 decoding: good, empty payload
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pkcs1_v15_decode:MBEDTLS_RSA_PUBLIC:"0001ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff00":0:0:0
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EMSA-V15 decoding: bad first byte
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pkcs1_v15_decode:MBEDTLS_RSA_PUBLIC:"0101ffffffffffffffff00":0:42:MBEDTLS_ERR_RSA_INVALID_PADDING
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EMSA-V15 decoding: bad second byte (0 instead of 1)
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pkcs1_v15_decode:MBEDTLS_RSA_PUBLIC:"0000ffffffffffffffff00":0:42:MBEDTLS_ERR_RSA_INVALID_PADDING
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EMSA-V15 decoding: bad second byte (2 instead of 1)
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pkcs1_v15_decode:MBEDTLS_RSA_PUBLIC:"0002ffffffffffffffff00":0:42:MBEDTLS_ERR_RSA_INVALID_PADDING
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EMSA-V15 decoding: padding too short (0)
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pkcs1_v15_decode:MBEDTLS_RSA_PUBLIC:"000100":0:42:MBEDTLS_ERR_RSA_INVALID_PADDING
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EMSA-V15 decoding: padding too short (7)
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pkcs1_v15_decode:MBEDTLS_RSA_PUBLIC:"0001ffffffffffffff0000ffffffffffffffff00":0:42:MBEDTLS_ERR_RSA_INVALID_PADDING
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EMSA-V15 decoding: invalid padding at first byte
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pkcs1_v15_decode:MBEDTLS_RSA_PUBLIC:"0001fffffffffffffffe00":0:42:MBEDTLS_ERR_RSA_INVALID_PADDING
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EMSA-V15 decoding: invalid padding at last byte
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pkcs1_v15_decode:MBEDTLS_RSA_PUBLIC:"0001feffffffffffffff00":0:42:MBEDTLS_ERR_RSA_INVALID_PADDING
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EMSA-V15 decoding: unfinished padding
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pkcs1_v15_decode:MBEDTLS_RSA_PUBLIC:"0001ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff":0:42:MBEDTLS_ERR_RSA_INVALID_PADDING
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EMSA-V15 decoding: unfinished padding with invalid first byte
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pkcs1_v15_decode:MBEDTLS_RSA_PUBLIC:"0001feffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff":0:42:MBEDTLS_ERR_RSA_INVALID_PADDING
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EMSA-V15 decoding: unfinished padding with invalid last byte
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pkcs1_v15_decode:MBEDTLS_RSA_PUBLIC:"0001fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe":0:42:MBEDTLS_ERR_RSA_INVALID_PADDING
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@ -108,6 +108,161 @@ exit:
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void pkcs1_v15_decode( int mode,
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char *input_hex,
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int expected_plaintext_length_arg,
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int output_size_arg,
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int expected_result )
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{
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size_t input_len;
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size_t expected_plaintext_length = expected_plaintext_length_arg;
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size_t output_size = output_size_arg;
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rnd_pseudo_info rnd_info;
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mbedtls_mpi P1, Q1, H, G;
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mbedtls_rsa_context ctx;
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static unsigned char N[128] = {
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0xc4, 0x79, 0x4c, 0x6d, 0xb2, 0xe9, 0xdf, 0xc5,
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0xe5, 0xd7, 0x55, 0x4b, 0xfb, 0x6c, 0x2e, 0xec,
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0x84, 0xd0, 0x88, 0x12, 0xaf, 0xbf, 0xb4, 0xf5,
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0x47, 0x3c, 0x7e, 0x92, 0x4c, 0x58, 0xc8, 0x73,
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0xfe, 0x8f, 0x2b, 0x8f, 0x8e, 0xc8, 0x5c, 0xf5,
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0x05, 0xeb, 0xfb, 0x0d, 0x7b, 0x2a, 0x93, 0xde,
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0x15, 0x0d, 0xc8, 0x13, 0xcf, 0xd2, 0x6f, 0x0d,
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0x9d, 0xad, 0x30, 0xe5, 0x70, 0x20, 0x92, 0x9e,
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0xb3, 0x6b, 0xba, 0x5c, 0x50, 0x0f, 0xc3, 0xb2,
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0x7e, 0x64, 0x07, 0x94, 0x7e, 0xc9, 0x4e, 0xc1,
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0x65, 0x04, 0xaf, 0xb3, 0x9f, 0xde, 0xa8, 0x46,
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0xfa, 0x6c, 0xf3, 0x03, 0xaf, 0x1c, 0x1b, 0xec,
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0x75, 0x44, 0x66, 0x77, 0xc9, 0xde, 0x51, 0x33,
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0x64, 0x27, 0xb0, 0xd4, 0x8d, 0x31, 0x6a, 0x11,
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0x27, 0x3c, 0x99, 0xd4, 0x22, 0xc0, 0x9d, 0x12,
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0x01, 0xc7, 0x4a, 0x73, 0xac, 0xbf, 0xc2, 0xbb
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};
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static unsigned char E[1] = { 0x03 };
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static unsigned char P[64] = {
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0xe5, 0x53, 0x1f, 0x88, 0x51, 0xee, 0x59, 0xf8,
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0xc1, 0xe4, 0xcc, 0x5b, 0xb3, 0x75, 0x8d, 0xc8,
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0xe8, 0x95, 0x2f, 0xd0, 0xef, 0x37, 0xb4, 0xcd,
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0xd3, 0x9e, 0x48, 0x8b, 0x81, 0x58, 0x60, 0xb9,
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0x27, 0x1d, 0xb6, 0x28, 0x92, 0x64, 0xa3, 0xa5,
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0x64, 0xbd, 0xcc, 0x53, 0x68, 0xdd, 0x3e, 0x55,
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0xea, 0x9d, 0x5e, 0xcd, 0x1f, 0x96, 0x87, 0xf1,
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0x29, 0x75, 0x92, 0x70, 0x8f, 0x28, 0xfb, 0x2b
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};
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static unsigned char Q[64] = {
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0xdb, 0x53, 0xef, 0x74, 0x61, 0xb4, 0x20, 0x3b,
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0x3b, 0x87, 0x76, 0x75, 0x81, 0x56, 0x11, 0x03,
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0x59, 0x31, 0xe3, 0x38, 0x4b, 0x8c, 0x7a, 0x9c,
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0x05, 0xd6, 0x7f, 0x1e, 0x5e, 0x60, 0xf0, 0x4e,
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0x0b, 0xdc, 0x34, 0x54, 0x1c, 0x2e, 0x90, 0x83,
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0x14, 0xef, 0xc0, 0x96, 0x5c, 0x30, 0x10, 0xcc,
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0xc1, 0xba, 0xa0, 0x54, 0x3f, 0x96, 0x24, 0xca,
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0xa3, 0xfb, 0x55, 0xbc, 0x71, 0x29, 0x4e, 0xb1
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};
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unsigned char original[128];
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unsigned char intermediate[128];
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static unsigned char default_content[128] = {
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/* A randomly generated pattern. */
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0x4c, 0x27, 0x54, 0xa0, 0xce, 0x0d, 0x09, 0x4a,
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0x1c, 0x38, 0x8e, 0x2d, 0xa3, 0xc4, 0xe0, 0x19,
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0x4c, 0x99, 0xb2, 0xbf, 0xe6, 0x65, 0x7e, 0x58,
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0xd7, 0xb6, 0x8a, 0x05, 0x2f, 0xa5, 0xec, 0xa4,
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0x35, 0xad, 0x10, 0x36, 0xff, 0x0d, 0x08, 0x50,
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0x74, 0x47, 0xc9, 0x9c, 0x4a, 0xe7, 0xfd, 0xfa,
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0x83, 0x5f, 0x14, 0x5a, 0x1e, 0xe7, 0x35, 0x08,
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0xad, 0xf7, 0x0d, 0x86, 0xdf, 0xb8, 0xd4, 0xcf,
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0x32, 0xb9, 0x5c, 0xbe, 0xa3, 0xd2, 0x89, 0x70,
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0x7b, 0xc6, 0x48, 0x7e, 0x58, 0x4d, 0xf3, 0xef,
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0x34, 0xb7, 0x57, 0x54, 0x79, 0xc5, 0x8e, 0x0a,
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0xa3, 0xbf, 0x6d, 0x42, 0x83, 0x25, 0x13, 0xa2,
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0x95, 0xc0, 0x0d, 0x32, 0xec, 0x77, 0x91, 0x2b,
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0x68, 0xb6, 0x8c, 0x79, 0x15, 0xfb, 0x94, 0xde,
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0xb9, 0x2b, 0x94, 0xb3, 0x28, 0x23, 0x86, 0x3d,
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0x37, 0x00, 0xe6, 0xf1, 0x1f, 0x4e, 0xd4, 0x42
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};
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unsigned char final[128];
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size_t output_length = 0x7EA0;
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memset( &rnd_info, 0, sizeof( rnd_pseudo_info ) );
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mbedtls_mpi_init( &P1 ); mbedtls_mpi_init( &Q1 );
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mbedtls_mpi_init( &H ); mbedtls_mpi_init( &G );
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mbedtls_rsa_init( &ctx, MBEDTLS_RSA_PKCS_V15, 0 );
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TEST_ASSERT( mbedtls_mpi_read_binary( &ctx.N, N, sizeof( N ) ) == 0 );
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TEST_ASSERT( mbedtls_mpi_read_binary( &ctx.E, E, sizeof( E ) ) == 0 );
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TEST_ASSERT( mbedtls_mpi_read_binary( &ctx.P, P, sizeof( P ) ) == 0 );
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TEST_ASSERT( mbedtls_mpi_read_binary( &ctx.Q, Q, sizeof( Q ) ) == 0 );
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ctx.len = sizeof( N );
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TEST_ASSERT( mbedtls_mpi_sub_int( &P1, &ctx.P, 1 ) == 0 );
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TEST_ASSERT( mbedtls_mpi_sub_int( &Q1, &ctx.Q, 1 ) == 0 );
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TEST_ASSERT( mbedtls_mpi_mul_mpi( &H, &P1, &Q1 ) == 0 );
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TEST_ASSERT( mbedtls_mpi_gcd( &G, &ctx.E, &H ) == 0 );
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TEST_ASSERT( mbedtls_mpi_inv_mod( &ctx.D , &ctx.E, &H ) == 0 );
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TEST_ASSERT( mbedtls_mpi_mod_mpi( &ctx.DP, &ctx.D, &P1 ) == 0 );
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TEST_ASSERT( mbedtls_mpi_mod_mpi( &ctx.DQ, &ctx.D, &Q1 ) == 0 );
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TEST_ASSERT( mbedtls_mpi_inv_mod( &ctx.QP, &ctx.Q, &ctx.P ) == 0 );
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TEST_ASSERT( mbedtls_rsa_check_privkey( &ctx ) == 0 );
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input_len = unhexify( original, input_hex );
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memset( original + input_len, 'd', sizeof( original ) - input_len );
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if( mode == MBEDTLS_RSA_PRIVATE )
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TEST_ASSERT( mbedtls_rsa_public( &ctx, original, intermediate ) == 0 );
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else
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TEST_ASSERT( mbedtls_rsa_private( &ctx, &rnd_pseudo_rand, &rnd_info,
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original, intermediate ) == 0 );
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memcpy( final, default_content, sizeof( final ) );
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TEST_ASSERT( mbedtls_rsa_pkcs1_decrypt( &ctx,
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&rnd_pseudo_rand, &rnd_info,
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mode,
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&output_length,
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intermediate,
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final,
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output_size ) == expected_result );
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if( expected_result == 0 )
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{
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TEST_ASSERT( output_length == expected_plaintext_length );
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TEST_ASSERT( memcmp( original + sizeof( N ) - output_length,
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final,
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output_length ) == 0 );
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}
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else if( expected_result == MBEDTLS_ERR_RSA_INVALID_PADDING ||
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expected_result == MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE )
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{
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size_t max_payload_length =
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output_size > sizeof( N ) - 11 ? sizeof( N ) - 11 : output_size;
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size_t i;
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size_t count = 0;
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#if !defined(MBEDTLS_RSA_ALT)
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/* Check that the output in invalid cases is what the default
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* implementation currently does. Alternative implementations
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* may produce different output, so we only perform these precise
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* checks when using the default implementation. */
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TEST_ASSERT( output_length == max_payload_length );
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for( i = 0; i < max_payload_length; i++ )
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TEST_ASSERT( final[i] == 0 );
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#endif
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/* Even in alternative implementations, the outputs must have
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* changed, otherwise it indicates at least a timing vulnerability
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* because no write to the outputs is performed in the bad case. */
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TEST_ASSERT( output_length != 0x7EA0 );
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for( i = 0; i < max_payload_length; i++ )
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count += ( final[i] == default_content[i] );
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/* If more than 16 bytes are unchanged in final, that's evidence
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* that final wasn't overwritten. */
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TEST_ASSERT( count < 16 );
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}
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exit:
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mbedtls_mpi_free( &P1 ); mbedtls_mpi_free( &Q1 );
|
||||
mbedtls_mpi_free( &H ); mbedtls_mpi_free( &G );
|
||||
mbedtls_rsa_free( &ctx );
|
||||
}
|
||||
/* END_CASE */
|
||||
|
||||
/* BEGIN_CASE */
|
||||
void pkcs1_rsassa_v15_sign( int mod, int radix_P, char *input_P, int radix_Q,
|
||||
char *input_Q, int radix_N, char *input_N,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user